CVE-2019-15069
📋 TL;DR
This vulnerability allows attackers to bypass authentication on Smart Battery A4 portable charger web management interfaces without modifying device files. Attackers can gain administrative privileges to control the device. This affects Smart Battery A4 portable chargers with firmware version r1.7.9 or earlier.
💻 Affected Systems
- Smart Battery A4 multifunctional portable charger
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of device management allowing attackers to reconfigure charging parameters, potentially causing battery damage, fire hazards, or using the device as an attack vector on connected networks.
Likely Case
Unauthorized access to device management interface allowing monitoring of charging activities, changing device settings, or disabling security features.
If Mitigated
Limited impact if device is isolated from networks and physical access is controlled, though authentication bypass remains possible if interface is accessible.
🎯 Exploit Status
The vulnerability description indicates authentication bypass without modifying device files, suggesting a simple exploit. No public exploit code was found in the provided references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware versions after r1.7.9
Vendor Advisory: https://www.twcert.org.tw/subpages/ServeThePublic/public_document_details.aspx?lang=en-US&id=46
Restart Required: Yes
Instructions:
1. Check current firmware version via device management interface. 2. Download updated firmware from manufacturer. 3. Upload and apply firmware update through management interface. 4. Reboot device to complete installation.
🔧 Temporary Workarounds
Network isolation
allIsolate the device from untrusted networks to prevent remote exploitation
Access control restrictions
allImplement network access controls to restrict who can reach the device management interface
🧯 If You Can't Patch
- Disconnect device from any network connections and use only as standalone charger
- Implement strict firewall rules to block all access to the device management interface
🔍 How to Verify
Check if Vulnerable:
Access the device web interface and attempt to bypass authentication using known methods, or check firmware version against vulnerable rangeCheck Version:
Check firmware version in device management interface under System or About sectionsVerify Fix Applied:
After updating firmware, verify authentication is required for management interface access and test authentication bypass attempts fail📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to management interface
- Authentication bypass patterns in web logs
Network Indicators:
- Unusual traffic to device management port (typically 80/443)
- Authentication bypass attempts in HTTP traffic
SIEM Query:
source_ip accessing device_ip:80 AND (http_status=200 OR http_method=POST) WITHOUT prior auth_cookie OR auth_header